Question

A can do a piece of work in 20 days and B can do it in 30 days. How long will they take to do the work together?

A 15 Correct Answer Incorrect Answer
B 12 Correct Answer Incorrect Answer
C 20 Correct Answer Incorrect Answer
D 25 Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

The correct answer is B

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